One of our most important rebuilding work right now is the power cable replacement between Embarcadero and 24th Mission.

Crews recently and successfully laid a 1,150-ft long cable pull between the Mission stations. It's a milestone in this multiyear project. We'll explain why.

We are replacing power cables all throughout the system, starting in San Francisco, our busiest corridor.

We've used nitrogen-filled cables to feed power to our trains. Installed in the 1970s, these 34.5 kV cables are worn out and nearing end of their lifespan.

Using voter-approved Measure RR funds, BART is replacing nitrogen-filled cables with new modern-shielded cables. These new cables will help provide BART trains with a reliable power supply to run.

These cables are quite big and heavy, with circumference of a large grapefruit.

For the past 18 months, crews have been working on Sundays installing three miles of conduits in the SF tunnel.

Conduits are hollow protective tubes that protect the 34.5 kV cables. The new cables will run through the conduits.

Last Sunday, crews successfully installed a 1,150-ft cable pull between 16th and 24th Mission St stations.

Cables were fed into the conduit from a cable truck at one end and pulled through the conduit by a puller truck stationed a quarter mile away at the other end.

This was the first successful cable pull in the San Francisco line. We have 60+ more left to do. Ultimately, this will result in 12 miles of conduit and 36 total miles of cable installed.

Multiple cable replacement projects in the East Bay are planned as well.

During this time of historically low ridership, BART is diverting employees and resources toward rebuilding work such as SF power cable replacement.

BART also has changed service patterns to help facilitate more capital work to be done. https://twitter.com/SFBART/status/1247874461514125312